A population consists of three strata with N1 = N2 = 1000 and N3 = 500. A stratified random sample with 10 observations in each stratum yields the following data: Stratum 1 94 99 106 106 101 102 122 104 97 97 Stratum 2 183 183 179 211 178 179 192 192 201 177 Stratum 3 343 302 286 317 289 284 357 288 314 276 Estimate the population mean and total and give a 90% confidence interval.

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